#!/bin/sh -e
# Check which package owns a file

case "$1" in ''|--help|-h) printf '%s\n' "usage: ${0##*/} [file]" ; exit 0 ; esac

# If full path is not specified, use either the current directory, or look for
# a command.
case "$1" in /*) ;;
    *)
        if [ -f "$1" ]; then
            set -- "$PWD/$1"
        else
            set -- "$(command -v "$1")"
        fi
esac

# Strip 'CPT_ROOT' from the file path if passed and
# follow symlinks.
file="${1#$CPT_ROOT}"
dirname=$(cpt-readlink "$CPT_ROOT/${file%/*}")
file="$dirname/${file##*/}"

# Check if the file exists and exit if it is not.
[ -f "$file" ] || {
    [ -d "$file" ] && printf '%s\n' \
        "error: please specify a file instead of a directory" >&2 ||
        printf '%s\n' "error: file '$1' doesn't exist." >&2
    exit 1
}

# Print the full path to the manifest file which contains
# the match to our search.
pkg_owns=$(grep -lFx "${file#$CPT_ROOT}" \
                     "$CPT_ROOT/var/db/cpt/installed/"*/manifest)


# Extract the package name from the path above.
pkg_owns=${pkg_owns%/*}
pkg_owns=${pkg_owns##*/}

printf '%s\n' "$pkg_owns"